user/sven/linux.git/include/linux/vgaarb.h, branch v5.12-rc2

vgaarb: Remove unneeded semicolons

2021-01-18T09:52:41Z

Remove superfluous semicolons after function definitions. Signed-off-by: Yue Zou Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210118010356.214491-1-zouyue3@huawei.com

vgaarb: mark vga_tryget static

2020-08-01T09:28:17Z

This symbols isn't used anywhere outside of vgaarb.c. Signed-off-by: Christoph Hellwig Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200801061713.307434-1-hch@lst.de

drm: move i915_kick_out_vgacon to vgaarb

2019-03-07T09:34:37Z

Also rename it to vga_remove_vgacon and add kerneldoc text. Signed-off-by: Gerd Hoffmann Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20190301092502.30948-2-kraxel@redhat.com

vgaarbiter: rst-ifiy and polish kerneldoc

2016-08-16T16:49:56Z

Move the documentation into Documentation/gpu, link it up and pull in the kernel doc. No actual text changes except that I did polish the kerneldoc a bit, especially for vga_client_register(). v2: Remove some rst from vga-switcheroo.rst that I don't understand, but which seems to be the reason why the new vgaarbiter.rst sometimes drops out of the sidebar index. v3: Drop one level of headings and clarify the vgaarb one a bit. v4: Fix some typos (Sean). Cc: Jonathan Corbet Cc: linux-doc@vger.kernel.org Cc: Sean Paul Reviewed-by: Sean Paul Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-20-git-send-email-daniel.vetter@ffwll.ch

vgaarb: Stub vga_set_legacy_decoding()

2015-04-07T17:14:38Z

vga_set_legacy_decoding() is defined in drivers/gpu/vga/vgaarb.c, which is only compiled with CONFIG_VGA_ARB. A caller would therefore get an undefined symbol if the VGA arbiter is not enabled. Signed-off-by: Alex Williamson Acked-by: Dave Airlie

vgaarb: Drop obsolete #ifndef

2014-09-16T21:02:55Z

Commit 20cde694027e ("x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()") moved boot video device detection from efifb to x86 and ia64 pci/fixup.c. Remove the left-over #ifndef check that will always match since the corresponding arch-specific define is gone with above patch. Signed-off-by: Bruno Prémont Signed-off-by: Bjorn Helgaas CC: Matthew Garrett

Revert "i915: Update VGA arbiter support for newer devices"

2013-10-11T05:19:22Z

This reverts commit 81b5c7bc8de3e6f63419139c2fc91bf81dea8a7d. Adding drm/i915 into the vga arbiter chain means that X (in a piece of well-meant paranoia) will do a get/put on the vga decoding around _every_ accel call down into the ddx. Which results in some nice performance disasters [1]. This really breaks userspace, by disabling DRI for everyone, and stops OpenGL from working, this isn't limited to just the i915 but both the integrated and discrete GPUs on multi-gpu systems, in other words this causes untold worlds of pain, Ville tried to come up with a Great Hack to fiddle the required VGA I/O ops behind everyone's back using stop_machine, but that didn't really work out [2]. Given that we're fairly late in the -rc stage for such games let's just revert this all. One thing we might want to keep is to delay the disabling of the vga decoding until the fbdev emulation and the fbcon screen is set up. If we kill vga mem decoding beforehand fbcon can end up with a white square in the top-left corner it tried to save from the vga memory for a seamless transition. And we have bug reports on older platforms which seem to match these symptoms. But again that's something to play around with in -next. References: [1] http://lists.x.org/archives/xorg-devel/2013-September/037763.html References: [2] http://www.spinics.net/lists/intel-gfx/msg34062.html Cc: Alex Williamson Cc: Ville Syrjälä Cc: Chris Wilson Signed-off-by: Daniel Vetter Signed-off-by: Dave Airlie

i915: Update VGA arbiter support for newer devices

2013-09-03T17:17:59Z

This is intended to add VGA arbiter support for Intel HD graphics on Core processors. The old GMCH registers no longer exist, so even though it appears that i915 participates in VGA arbitration, it doesn't work. On Intel HD graphics we already attempt to disable VGA regions of the device. This makes registering as a VGA client unnecessary since we don't intend to operate differently depending on how many VGA devices are present. We can disable VGA memory regions by clearing the memory enable bit in the VGA MSR. That only leaves VGA IO, which we update the VGA arbiter to know that we don't participate in VGA memory arbitration. We also add a hook on unload to re-enable memory and reinstate VGA memory arbitration. v3: Use explicit LEGACY_IO | LEGACY_MEM when restoring rather than LEGACY_MASK, per Ville's comments. v2: I915_READ/WRITE accessors don't work in i915_disable_vga, use inb/outb directly. Also, on the driver unbind VGA enable path, acquire legacy IO to re-enable VGA memory. Correct comment. Signed-off-by: Alex Williamson Reviewed-by: Ville Syrjälä [danvet: Add patch changelog. Also squash in a fixup to have a dummy static inline for vga_set_legacy_decoding for CONFIG_VGA_ARB=n as reported by the 0-day kernel build bot.] Signed-off-by: Daniel Vetter fixup 2

Fix misspellings of "whether" in comments.

2012-11-19T13:31:35Z

"Whether" is misspelled in various comments across the tree; this fixes them. No code changes. Signed-off-by: Adam Buchbinder Signed-off-by: Jiri Kosina

vgaarb: Provide dummy default device functions

2012-05-03T08:30:55Z

Add some stub functions for the case where CONFIG_VGA_ARB is disabled. Signed-off-by: Matthew Garrett Signed-off-by: Dave Airlie